BZ, chemically known as 3-Quinuclidinyl Benzilate, is a potent incapacitating agent that affects the central nervous system. It is classified as a deliriant, meaning it induces a state of delirium characterized by confusion, hallucinations, and a lack of awareness of one’s surroundings. Developed in the mid-20th century, BZ has been researched and utilized by the military for its potential to incapacitate enemy forces without causing permanent harm.
BZ is a white crystalline powder that is odorless and tasteless. It can be disseminated as an aerosol or in liquid form. The agent works by blocking the action of acetylcholine, a neurotransmitter involved in the transmission of nerve impulses in the brain. Specifically, BZ acts as an antagonist at muscarinic acetylcholine receptors, leading to a disruption of various bodily functions and cognitive processes.
Exposure to BZ can result in a range of symptoms, typically appearing within 30 minutes to a few hours after exposure and lasting for up to several days. Common symptoms include:
Cognitive Impairment: Severe confusion, disorientation, and difficulty concentrating.
Hallucinations: Visual and auditory hallucinations are common, often vivid and disturbing.
Physical Effects: Dilated pupils, dry mouth, elevated body temperature, tachycardia (rapid heart rate), and flushed skin.
Behavioral Changes: Agitation, aggressive behavior, and inability to perform coordinated tasks.
Research into BZ began in the 1950s, with the United States and several other countries exploring its potential as a non-lethal incapacitating agent. During the Cold War, both the U.S. and the Soviet Union conducted extensive research into BZ and similar compounds, considering their use in various tactical scenarios.
BZ was considered for use in a range of military operations, including:
Crowd Control: To incapacitate large groups of people without causing permanent injury.
Hostage Rescue: To subdue captors and rescue hostages with minimal risk of death.
Battlefield Scenarios: To disable enemy troops, making them unable to fight or operate equipment effectively.
The U.S. military conducted numerous tests involving BZ, often using volunteer soldiers to study its effects and potential applications. The most notable testing program was conducted at Edgewood Arsenal in Maryland, where service members were exposed to various chemical agents, including BZ. These tests raised significant ethical concerns, particularly regarding informed consent and the long-term health effects on participants.
Today, BZ is considered a controlled substance under the Chemical Weapons Convention (CWC), which prohibits its use in warfare. The research and development of BZ as a weapon have largely ceased, and existing stockpiles have been destroyed or repurposed for non-military research. However, BZ remains a topic of interest in toxicology and pharmacology due to its unique effects on the human body.
Document Archive
BZ Psychochemical War Agents – Russ Kick Collection (FOIA release with two reports) – [31 Pages, 5.3MB]
Clinical and Military Medical Aspects of Psychopoisons – Russ Kick Collection (FOIA release with two reports) – [31 Pages, 5.3MB]
Determination of Trace Quantities of BZ (3-Quinuclidinyl Benzilate) in Air and Water [27 Pages]
Evaluation of Analytical Methods of the Determination of BZ [54 Pages]
Test Reports for Agent BZ Detonation Tests [134 Pages]
